Free account available. Visually appealing interface with extra features. Maps can be shared for collaboration, published, printed/exported as a pdf and embedded.
mindmeister
ree Google account. Create documents, presentations, spreadsheets, form or drawing. Organize into folders, publish to the web and share documents with other users. Supports existing document upload (word & powerpoint).
It's a good idea to be knowledgeable about ways to incorporate different learning strategies to help the student understand the material better. This site gives great examples of different technology machines that help students learn better. It helps teachers recognize advanced machines and tools of technology for students.